Natural History of Bumble Bees - SARE
Worldwide, there are approximately 250 species of bumble bees. Over 40 bumble bee species are native to North America. Of these, only one species, Bombus impatiens, is currently reared by commercial producers in North America. Bumble bees vary greatly in size, with bees weighing from 40 to 830 milligrams (0.0014 to 0.029 ounces). There is […]
PDF] Managing Alternative Pollinators: A Handbook for Beekeepers, Growers, and Conservationists, SARE Handbook 11, NRAES-186
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Natural History of Bumble Bees - SARE
Natural History - SARE
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Chapter Seven: The Alfalfa Leafcutter Bee - SARE